There’s a tie-in between the cosmological argument and the ontological argument. You see, without the creative power of God, the universe could not have begun. Hence, God is a necessary being because the cosmos is real and existent (even if existence isn’t a predicate) and thus the cosmos had a cause, which is God.
And this is all before we jump from a logical argument that a god must exist and try to some how marry it to the idea that this god is a particular god as described in, let’s say, the Old Testament.
Yes, and if I can add my strange two cents to this (in case @simon hasn’t incorporated something like it into his yellowgrain project), this humanly constructed notion of “perfection” helped push the idea that a superhuman can exist, and yeah, isn’t it fun to describe what He might be like so that we might all try to be like Him.
Fact is, humans, by nature, often strive for perfection, making God a proxy for it. I feel it’s important to realize such constructions of ours like this one, because it so easily becomes a dogma in any kind of idealism, each with its own inevitable history of corruption of logic just for the sake of upholding the perfection as somehow “real”. Capitalism comes to mind as being treated as if it’s just inherently perfect, and even the US Constitution.